First of all, I apologize in advance for writing a question that involves another software program. I will try to focus my questions on Mplus as much as possible.

I'm having trouble understanding whether the multigroups (MG) analyses between AMOS and Mplus are completely reconcilable. I'm trying to replicate a multigroups analysis with okay fit in AMOS (RMSEA = 068; Chi Square = 42.89 df = 18) in Mplus, but the results are a substantially poorer fit in Mplus(RMSEA = .101; Chi Square = 55.761 df = 22) and I can't figure out why. The AMOS model I used is completely unconstrained. The models were the same in both programs before adding the grouping factor.

I've pored over the default settings for both programs, and would like to understand how to manipulate these in Mplus to match what I'm seeing in AMOS, as I would like to conduct more advanced analyses in Mplus.

(Q1) What could possibly account for the 4 extra dfs in Mplus? Here is my Mplus model: